James j



- J. 1. HOOD.

CIRCUIT CLOSER FOR LOCKS,

APPLICATION FILED JULY 3, I918.

1,347,039. I Patented y 20, 1929.

2 SHEETS-SHEET 1.

- cl clfiaod J. J. HOOD.

CIRCUIT CLOSER FOR LOCKS. APPLICATION FILED JULY 3. 1918..

2 SHEETS-SHEET 2- 1,347,039. Patenied July 20, 192

.miims .1. 11001), or

PONDER, GEORGIA, ASSIG NOR TWENTY-FIVE PER CENT. TO

SARAH A. SAXON, 0F PONDER, GEORGIA.

I cincurr-cLosnn ronnocxs.

To all whom it"htay concern: I I Be it known that 1, JAMES 111000, acitizen of the UnitedStates, residing at Ponder," in the county ofUnionand State of Greorgi'a, have invente d certain new and usefulImprovements in Circuit-Closers for Locks andI do hereby declare the'following to be affull, clearyand exact description of the invention,such as will enable others skilled in the art to which it'appertai'nstomake Y to form a pair of relatively spaced arms 6 andjusethe same. i I

This invent on relates to improvements in burglar alarm locks andhas forone of its objects the provision of a device ofthis' character wherebyan alarm will be given upon retracting the locking bolt indicating thatan unauthorized person is opening the locker the objectto which the lockis applied. r L f Another object of this invention is the provision of akeyhole guard adapted to actuate the alarm when moved to uncover thekeyhole.

A further obje ct of this invention is the provision of a burglar alarmlock of the above stated character, which shall be simple, durable andefiicient,and which may be manufactured and sold at a comparatively lowcost.

With these and other objects in view as will become more apparent as thedescription proceeds, the invention consists in certain novel featuresof construct1on,'comb1 nation, and arrangement of parts as w llbeherein'after more fully described and claimed.

Fora complete understanding of my inventi on, reference is .t o-be hadto'the following description, and accompanying draw; ings, in which I IFigure 1 is a front elevation of aburglar alarm lock constructed inaccordance with, I mg nvention,

ig. 2' is a verticalsectional view of the m r V Fig. 3 is a longitudinalsectional view taken onthe line M of Fig. 2,

Fig. 4 is a detail sectional View taken on amine Hof Fig. 2,

Fig. 5 is a detail sectional view illustrating one of the contact poles,I

Fig. 6is a detail sectional view illustratin spaced contacts; and a 'gL'T is a detail sectional view of a ratchet wheel.

Referring in detail to the drawings, the numeral 1 indicatesa lockcasing having the removable front wall 2 adapted to be sehaving,shoulders? formed uponthe ends thereof .A knob spindle 8' extendsthrough the casing 1 and has mounted thereon a member 9 that overliesthe arms 6 and in engagement with the shoulders 7 whereby Specificationof Letters Patent. Patented July 20, 1920. I Application filed July3,1913. Serial No. 243,241. 1

upon rotating the knob, spindle 8 by the usual knobs 1(), the latch boltwill be re-' tractedjagainst the tension of a spring 12. The spring 12is secured to a lug 13 carried by the casing and has its other enddisposed within a notch 14 formed within the latch bolt. The casing 1has anopening 15 below the latch bolt 4' to slidably receive the lockingbolt 16. The locking bolt 16 is provided with an elongated slot 18 toreceive a lug 19 carried by the casing wherein the lock bolt is slidablysupported within the casing. The rear end of the locking bolt 16 isprovided with a cut away portion 20; forr'the purpose of receiving anordinarykey ofany desired character inserted through the keyhole-21 ofthe casing 1 to move the locking bolt 16 into'engagement with a keeper(not shown) or to retract the same. If desired, suitable guards (notshown) may be placed about the keyhole 21 within the casing 1 for thepurpose of making it necessary to use a particular type of key in orderto operate the locking bolt 16. The locking bolt has its lower edge provided with a shoulder 21 forming spaced notches 22 adapted to be engagedby the end of a leaf spring 23 carried by a lug 24 formed in the casing.This spring 23 is adapted to hold the locking bolt 16 against accidentalmovement when in either of its positions.

I A shaft 25 is journaled in the casing 1 and in a suitable bracket 26carried by the casing and has formed thereon an arm 27 disposed inrearof the locking bolt 16 and which is adapted to be engaged by thelocking bolt when said bolt is retracted for retating the shaft'25. Ashaft 28 is jour naled in the casing 1 adjacent the shaft and has a coilspring 29 mounted thereon.

One end'ofxthe coil spring is secured to the.

shaft while the opposite end extends forwardly and rests upon the shaft25placing the shaft 28 under the tension of the spring.

An arm 30 is carried by the shaft 25 and has its forward end curved as.illustrated at 31 and rests upon an arm 32 carried by the.

latedthcrefrom. A contact 36is carriediby a pole 3? supported by thecasing and insu; lated therefrom andisnormally spaced, from the contact3& at its free end.

The. arm 33being disposed over the 0011-.

tact 31 will move said contact in engagement with the. contact 36 uponretracting the locking bolt 16 thus. completing an electriccircuit to ana1arm'38. Thealarm 38 has connected, thereto conductors 3 9 and. 40.

ljheconductor 39 is connected to the pole.

37 while the conductor at) is connected to a,

battery or. other electrical source 41" which has. connected thereto aconductor 42 connected to a suitableswitch 4 3. The switch a3 isconnectedtothe pole by a conductor eta so that when the switch a3 is in,a closed position and the locking bolt 16 is retracted.

the electric alarm 38 will be sounded. A

member is carried by the casing and is,

disposed over the contact 34 for thepurpose of limiting the movement ofsaid contact in its proper position in relation to. the contact36. I

A shaft or spindle 46,-is journaled in the casing 1 and carries upon oneend a circular guard plate t? provided with a slot 48 in the. shape of akeyhole adapted to moved into registration with the keyhole 21 so that akey'may be inserted within the casing. 1 for the purpose of actuatingthe looking bolt 16. The slot 48 is normally out of, registration withthe keyhole 21- so. that the plate overlies the keyhole and prevents akey from being inserted therein. The spindle or shaft 46 is providedwith a suitable hand grip 19 for the purpose of rotating the same.Oppositely disposed grooves 50 are formed upon the shaft or spindle L6to receive oppositely disposed lugs 51 formed upon a. cam 52 so, thatthe cam is locked to the spindle or shaft $6 for rota; tion, therewithand is, located within the cas- An arm 33 is ca rried The contact 3% isconnected, to a. pole. 35 carried by the. casing- 1 and insuing 1 andadjacent the contact 35L so that when the cam is rotated the prominentportion thereof willengage thecontaet 3a: causing the contact tomovelaterally and as it moves laterally the lug 53 engages the contact 36completing the electric circuit to the alarm 38. The alarm at thisinstant being sounded by the rotation of the shaft or spindle 46 to aline the slot 18 with the keyhole 21. A ratchet wheel 5 1 is formed uponthe cam 52. and is normally engaged I by a. pivoted dog 55 carried by amember 56 mounted upon the casing l. The dog 55 is. normally urged intoengagement with the.

ratchet wheel 54: by means of a spring 57 so. that the guard plates? andspindle or shaft can be rotated only inv one direction.

While I have shown and described the, preferred. embodiment of myinvention, it will be understood that minor changesin.

construction, combination, and arrangement of parts may be made, withoutdeparting from the spirit and scope of. theinvention as claimed.

I claim is:

1. A device of the character set forth comprising a, casing, a lockingbolt slidable in said casing, tension means for said locking bolt,spaced contacts carried by said casing, ashaft. journa led in saidcasing, a

second, shaft .j ournaled in said casing, tension means for said secondshaft, anfarm carried by sa d second shaft and m, engagement with one ofthey contacts, means establishing a connection betweenthe shafts armcarried the first named shaft and having one end disposed at rightangles, an arm carried, by the second named shaft and underlyingtheright angled end of the first named arm, a third arm carried by thesecond named; shaft and disposed at right angles, spaced contactscarried by said casing, one of said contacts disposed adj acent the lastnamedarm, and; an arm car-.

ried by the firstnamed shaft and. adapted to be engaged by the lockingbolt when retracted, to move the contacts through the above named meansin engagement with other. a

3. A clrcuit closer for locks comprlsing a s ng kin r l da l n aing,'spaced contacts earned by said cas ng,

Having thus described my invention what means located in said casing formoving the contacts in enga ement with each other upon the retraction 0said bolt, a shaft journaled in said casing, a keyhole guard carried bysaid shaft, a cam carried by said shaft and adapted to move the contactsin enga ement with each other upon rotation of sai shaft,

a ratchet Wheel carried by said shaft, and a spring actuated dog carriedby said casing and engaging the ratchet Wheel to allow the 10 key guardto be rotated only in one direction. a

In testimony whereof I affix my signature in presence of two witnesses.

JAMES J. HOOD. Witnesses: V

J. H. DUGKWORTH, C. L. BALLEW.

